Tetra GH Test Kit expired?

[Fuzzy]

I picked up a Tetra GH Test kit from C328 yesterday but it doesn't seem to be working. The drops seem a little oily, need to shake to dissolve.

What is the GH usually of our tap water generally?

I tried even with 5ml of tap water, the drops stay a constant yellow, GH for tap water can't possibly be over 15?!

Is the kit expired / defective?

EDIT: Yup it was faulty, changed it to an API GH/KH kit and topped up the difference.

[michaelmah]

I also got a API masterkit for fresh water.

the GH tester seem to same problem as you encounter.

[sazuka]

try "Hagen-Nutrafin",
test so many brand already,
found this the best.

[berlinjs]

heard that GH kit cant last long

[michaelmah]

my API GH tester is produce on year 2003.

how long it will lasting for GH tester?